Hydraulic rear tipper for fast delivery vans



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//7 vento/ OTTO BALLEQT.

a/Agn Homey June 11,v 1935.

o. BALLERT HYDRAULIC REAR TIPPER FOR FAST DELIVERY VANS Filed June 10, 1932 Patented June 11, 1935 PATENT OFFICE HYDRAULIC' BEAR TIPPEB FOR FAST DELIVERY VANS om Baum, Berlin, Germany Application June 1o, 1932, serbi No. 16,3111y Germany October 13, 1931 2Claims.

Fast delivery vans are usually made light and short and can thus be easily turned about. 'Ihey can therefore without dimculty be steered rear foremost right up to the dumping place. That being so, it is not necessary to provide them with a sideways tipping arrangement, a rear tipper is suillcient.

To ensure economy in working such a fastl delivery van, the tipping device must also be light in weight and cheap to make.

Mechanical rear tippers hitherto devised for such vans have been subject to various disadvantages. If they were light and cheap, they were liable to wear' out quickly. Further, ii screw-spindles were used as the lifting-device, the tipper was not very eiIective.

Hydraulic tippers have proved the most eiIective. Those hitherto constructed have been, however, too dear and heavy. If located in the longitudinal axis oi' the chassis they had to be constructed as telescopic litters and necessitated 4 the iltting of a special bearingbar for the lii'ter in the frame of the chassis. In some cases it has been necessary to provide a special mounting for the pump.

The object oi' the present invention is a. hy-

Y draulic rear tipper free from the .above-mentioned defects. The invention consists in a single-piston lifter being disposed in the perpendicular midplane of the chassis in such an oblique position under the body of the truck, that at normal loading height and correspondingly lowlying centre oi' gravity of the truck the force to be exerted is but slightly in excess of the total weight exerted by the actual load plus the weight of the body. ATo enable the lifter to be placed in the requisite slanting position, on the one hand its lower -Iulcrum is mounted on the always available transverse member connecting the two front spring brackets of the rear springs, which in the low-frame chassis o! such vans' isrelatively low-lying;l the piston-rod-'iulcrum, on the other hand, being sunk into the iloor of the body of the van. For this engagement of the piston-,

and lifter can be-built-in as a whole in one piece.

It is suiilcient to x the hoist-foundation by means of two screws on to the chassis, and to Jseen from (ci. 29e-zz) connect the top end of the piston by a bolt with the body-truss.

If in the case oi' a power-driven tipper the pump has to be xed separately from the hoist, a special pipe-union is installed connected by a 5 pipe with the pump.

In any case, whether. with a handor a powerdriven device the tipping-device is easily mounted.

The installation o! the supply pipe is also quite 10 simple. 'I'he introduction of the pipe into the hoist is made by means of a stuiiing-box disposed as usual in the axis of the lower pivot bolt. The other end of the supply-pipe is attached rigidly by a ilangeto the pump and the pipe union respectively. The supply pipe is sol bent as to take up over as great a length as possible the slight deflections that take place when the van is running or during tipping. Owing to the distortions produced in the chassis when travelling over uneven ground, and in consequence of unequal distribution of the load in the body of the van it may happen that the central axis of thehoist is deflected by a slight angie from the perpendicular midplane o! the van. Both the lower hoist-fulcrum and the piston-rod head are made ball-shaped.' The globularity ot the bearing surfaces thus allows of a certain Obliquity of adjustment of the hoist and ensures a proper transmission of pressure 30 in such a contingenc Any strains caused by a chance tipping-over of the body are taken up by crossbolts passed through the inner and outer part oi' the ball bearing and lodged in the interior with sui'llcient play to allow of the necessary angular movement.

The invention is illustrated by examples in the Fig. l is a wide elevation partly .in section, y Fig. 2 the plan, o! a fast delivery van iltted 40 with a hydraulic rear tipper. in which the pump, driven by the driving-motor ct the van, is ilxed separate from the litter.

In Fig. 3 a side-elevation is shown, on a larger scale, oi' a hydraulic tipper iltted with a hand 45 pump.

Fig. 4 is the plan corresponding to Fig. 3, and

Fig. -5 is a section on line V-V oi' Fig. 4.

The arrangement shown in Figs. 1I and 2 differs from that shown in Figs. 3-5 in the type 50 and mounting of the pum The remaining parts are the same, are designated by the same reference numbers. and are-on' account of the larger scale-in some cases more easily to be 3 is the body of the van. 1 are the sills of the body. 3 is a crossbar connected with both sills of the body. 9, 9 designate the two side members of the chassis. 9a is a transverse axle lodged on the two side members, upon which the van body 9 pivots when being tipped. I0 is the crossbar connecting the two front spring ,brackets II, II of the rear springs I2, I2. On the cross member I is fixed the hoist foundation consistingof a `sheet metal angle I3. Upon this is screwed or riveted the lower fulcrum-bearing I I. I designates the hoist-cylinder, I9 the hoist-piston and I1 the piston-rod (see Fig. 4)

The outer end of piston-rod I1 is flattened of! on either side I1a, I1a and engageswith its ballshaped front surface I1b against a bearing I9'(see Figs. 3 and 5) xed on the cross member 9 and provided with a correspondingly slobular hollowed-outface. Bearing I9 passes into an opening 20 in the floor 2| of the van body 9. Opening 29 is covered in with a metal sheet 22. 'Ihe outer end of piston-rod I1 is connected with bearing I9 by a link-bolt 23 which is passed through both side walls I9a of bearing I9 and through a hole I1c made in the attened-o! outer end of the piston-rod I1. The outer nattened-ofl.' end of the piston-rod I1 has between the side faces I9a. and the hole I1c has with respect to the bolt 23, as much clearance as is necessary in order to allow of angular displacements o! the hoist I5, I1 from the midplane taking placeas explained above. The fulcrum-bearing Il is provided withv a ballshaped plug Ila,

` which engages in a correspondingly .ballshaped hollow in the bottom Napf; the cylinder and is connected with it by a link-bolt 24 (see F18. 4).

.The plug Ila has enough clearance sidewards in the globular hollow in the cylinder-bottom lia and with respect to the 'link-bolt 2l to allow of angular displacements of hoist I5, I1 from the midplane of the vanas explained above. l

In the example of the application of the invention shown in Figs. 1 and 2 a motor pump 2i is used, the said motor pump being mounted separate from the hoist under the driver's, seat.

Lever 21 actuates the escape-valve of the pump. In the example of the application shown in Figs.v 3-5 a hand pump 3I is used. yfixed by means' of angle irons 32 directly on the hoist-foundation I3.. 'Ihe hand ,pump I3 is actuated by means of an insertable hand lever 33.

In the example shown in Figs. l and 2 a pipe union 28 is fixed on to the hoist-foundation I3 and is connected by pipe 29 with' the hoist I5, I1 and by pipe 39 with the motor pump 25.

In the example shown in Figs. 3-4 the pump is connected directly with the hoist by pipe 29. Pipe 29 is connected in the customary manner with the interior of the cylinder I5 through a boring lib by means oI.' a stuiling-box 30 lyin in the axis of the link-bolt 24.

I claim:

l. In a fast delivery vehicle, a chassis, a body tippable about a transverse journal connecting the chassis and body, an obliquely placed hydraulic hoist comprising a piston and cylinder, joined to the chassis at its cylinder end and to the body at its piston end, the connection between said cylinder and chassis including ball and'socket joint elements and a bolt connecting the elements of said joint, there being suillcient clearance between said bolt and one of said elements to permit limited lateral displacement of onev of said elements with respect to the other. 2. In a fast delivery vehicle, a chassis, a body tippable about a transverse journal connecting the chassis and body, an obliquely-placed hydraulic hoist comprising a piston and cylinder joined to the chassis at its cylinder' end and to the body at its piston end, the connection between said piston and body.` including joint elements. one having a convex spherical face, and the other a concave spherical seat to receive said face, and a bolt interconnecting said joint elements, there being suicient clearance between said bolt and one of said elements to permit limited lateral displacement of one of saidjelements with respect to the other.

OTTO BALLERT. 

